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Sleep is a reversible neurobehavioral state characterized by reduced awareness, altered metabolism, and distinct electroencephalographic patterns across non-rapid eye movement and rapid eye movement stages that cycle within a circadian rhythm. Sleep architecture varies across the lifespan, with age-related changes in stage distribution and increased vulnerability to fragmentation and circadian disruption, which can impair cognition and increase morbidity. This course equips the clinician with knowledge of sleep staging criteria, electroencephalographic features, and polysomnographic interpretation, thereby improving the ability to distinguish normal variants from pathological findings and to accurately identify sleep disorders. Emphasis on arousal analysis and microstructural elements enhances diagnostic precision and clinical decision-making. Collaboration within an interprofessional team, including sleep specialists, neurologists, and respiratory therapists, strengthens comprehensive evaluation and coordinated management, leading to earlier diagnosis, optimized treatment strategies, and improved patient-centered outcomes. Objectives: Apply sleep staging criteria to polysomnography to classify wakefulness, non–rapid eye movement, and rapid eye movement sleep, and to communicate findings effectively with sleep technologists and interdisciplinary health care team members. Assess sleep history, safety risk, and occupational or school contributors to circadian disruption to guide diagnostic evaluation. Interpret arousal-related phenomena and sleep fragmentation in the context of common sleep disorders to inform referral and treatment planning. Implement interdisciplinary communication among sleep medicine specialists, pulmonologists, ear, nose, and throat specialists, psychiatrists, neurologists, and school health staff to improve patient outcomes. Access free multiple choice questions on this topic.

Sleep is the natural, periodic suspension of consciousness, characterized by reduced awareness and altered metabolism. The sleep-wake cycle is one of the most important circadian rhythms, alternating periodically over about 24 hours.[1] Sleep is considered a reversible behavioral state marked by perceptual disengagement from and unresponsiveness to the environment, characterized by distinct neurophysiological patterns, including the non-rapid eye movement and rapid eye movement sleep stages.[2] This phenomenon is highly conserved across endotherms (mammals and birds), indicating that it serves fundamental biological functions. The amount of sleep varies significantly across different species, influenced by factors such as diet, body size, and ecological conditions. Among mammals classified as either omnivores or carnivores, humans experience some of the briefest sleep durations.[3] This article discusses sleep physiology and architecture across the lifespan and assesses the clinical implications of their disruption.

Normal sleep plays an important role in human life. Changes in occupational technology, workplace ergonomics, and safety and risk-reduction strategies are important for preventing injuries and mitigating the negative effects of sleep deprivation and circadian dysfunction. Adequate strategies for assessing sleep disorders and employee wellness are an occupational safety issue that requires administrative and regulatory mandates. Teacher and school health staff participation ensures that sleep disorders and attention and learning issues are adequately evaluated in children. Furthermore, the presence of sleep disorders should prompt early referrals to sleep medicine specialists, psychiatrists, and neurologists. Early evaluation and coordinated referral pathways can reduce delays in diagnosis and treatment. Key EEG features across various sleep stages help sleep technologists score sleep stages and allow sleep specialists to accurately assess sleep disorders. Sleep disorder management is interdisciplinary, involving ear, nose, and throat specialists, pulmonologists, sleep medicine specialists, and psychiatrists who work together to help patients and their families improve behavior, cognitive function, and overall health.[41][42][43]